Process of storing drying oils



14 192 9 Jurpe 7 E. M. s. CHANDLER PROCESS OF STORING DRYING OILS Filed April 29. 1925 AT ToRA/E after. boiling me while still hot.

Patented June 14, I, H

nnwm it. s. onmnnnn, or TAUNTON, mssaonnsarrs. I

I PROCESS OF STORING DRYING OILS,

Application filed, April 29, 1925. Serial No. 26,666.

This invention relates to the storage of drying oils, such for, example, as linseed oil. In plants where oil cloth, linoleums and the like are manufactured and where, consev 5 quently, drying 'oils are used in-relatively large quantities, it is necessary to keep a largesupply of oil'in storage at practically all times. is oil is boiled before it is used, and it is'run into storage tanks immediately Drying oils oxidize very rapidly, particularly when hot, with the result that a scum or skin of oxidized oil forms'on the surface of the oil. This scum has a very tough rubberyconsistency, it will not again dissolve in the oil, and unless it is carefully strained out it causes much trouble in the subsequent manu-' facturing operations. While such a scum breaks up readily in the'operation of mixing the oil with the other ingredients used in the manufacture of oil cloth, linoleum, and the like, still it does not entirely disintegrate but remains in a granular condition and produces a lumpy surface inthe finished product. The formation of such a scum is, therefore, objectionable both because of the labor involved in getting rid of it, and also because the oxidized oil ofwhich the scum is composed is wasted. This is all the more 0bjectionable becausethe best part of the oil oxidizes most readily and therefore forms the greater "part of the scum. l

The present invention aims to overcome these objections and it provides a novel process oi'storing oil.

,The nature of the invention will be readily'understood from the following description when read in connection with the accompanying drawings, and the novel features 40 will be particularly pointed out in the ap-v pended claims. 'Referring'inow to the drawings,

- Figure 1 is a perspective view of a storage tank embodying one feature of the present I invention; and

Fig. 2 is a' transverse cross sectional view of the tank shown inFig. 1.

, other drying oil. is kept ina' substantially. 5o constant state of a itation while it 18 being:

stored, the formation of anoxidized scum' or skin on the surface of. thebil is prevented.

This result may be accomplished :in a

" number of 'forms of apparatus. One such I have discovered that if linseed oil or apparatus is illustrated in the drawings and comprises a horizontal tank 2- preferably of cylindrical form and provided near its opposite ends with heavy. circumferential rings 3 and 4. The ring 4 is supported on two grooved rolls '5 and 6, respectively, while the ring 3 is similarly supported by another air of rolls, one of whici is shown at 7. T el'e rolls are mounted in suitable bearin brackets which are su ported on bed bloc s 8 and 9. Both the rol s 6 and 7 are secured fast on a shaft 10 which carries a pulley 12 that may be connected to any convenient source of power-, so that when this shaft is driven the tank 2 will be rotated about its horizontal axis. The tank may be provided with the usual filling inlet 13, normally closed by a plug, and it also has a discharge nozzle 14 I equfpped with a valve. The usual manhol 15 also is provided.

In using this apparatus the tank ma be filled with oil to any desired level. So lo as the oil remains in it the tank is rotated at a' very slow speed, say for example, one revolution per minute. This requires very little'power, but the motion so imparted to the tank is suflicient tokeep the oil in it. in-

a substantially constant state of agitation. The 011 at the surface'and which is in contact with the air thus is constantly being i;

changed, and while this may result in a gradual oxidation of the. oil, still there is no opportunity for the oxidized particles of oil to cohereand form a scum or skin on the surface of'the oil. Such oxidation-as occurs is beneficial in ageing the oil.

This invention is of particular utility in storing boiled oil, since a scum of oxidized oil forms much more quickly on boiled oil than on raw oil.

The invention is also of advantage in storing raw drying 'oils since the constant agitation promotes the ageing action.

Having thus described my invention, what I desire to claim as new is:

1. That improvement in the method of storing drying oil which consists in maintaining it in a substantially constant state 7 of agitation. 2. That improvement in the method of storing drying oil which consists in confining a body of said oil in acontainen with v a portion of said body exposed 'to the air, and constantly changing the-oil composing the surface so exposed.

to keep the oil in substantially constant mo-.

tion.

4. That improvement in the method of storing drying oil which consists in conesions fining a body of oil a dosed container, 10

and rotating said container slowly.

5. That improvement fin the method of storing drying oil whichconsists in confining a body of oil in o-closed container,

and rotating said container slowly about a horizontal axis. 7

EDWIN M. s. CHANDLER. 

